Table 2.

Basic statistic results for modulus analysis of errors.

Basic-statistics	Δx error [mm]	Δy error [mm]	Δz error [mm]	Δr error [mm]
Mean	−7.6	−3.83	−0.26	9.53
Min	−0.25	0.16	0.04	2.02
Max	−10.84	−10.18	−7.76	18.39
RMS	3.75	3.24	3.08	3.23
Standard deviation	0.51	0.44	0.42	0.44

Error analysis was calculated with a sample size 53 ICP.

Δx: X axis error; Δy: Y axis error; Δz: Z axis error; Δr: Radial error.